Stress Corrosion Cracking of Copper–Nickel Alloys: A Review
Source abstract
Abstract
Under the combination of certain corrosive ions and stress, Cu-Ni alloys may experience severe stress corrosion cracking (SCC), which causes premature failure and hinders their further applications as crucial construction materials in various engineering fields. To reveal the origin of such failure, minimize the related negative impacts, and achieve economic and social benefits, this review summarizes all SCC-related issues by making a brief introduction to Cu-Ni alloys, reporting the SCC behavior in various environments, identifying the effects of different factors during SCC, and revealing the SCC degradation mechanisms. S2− and NH4+ are the prominent SCC initiators since the former can combine with Cu+ to form Cu2S as a non-protective corrosion product, while the latter has a great tendency to react with Cu2O/Cu and accelerate the general or local dissolution. Their combination has the most detrimental effect. The SCC mechanisms of Cu-Ni alloys are summarized as film rupture theory and dealloying theory. The related SCC mitigation strategies, including using inhibitors, tailoring alloying elements, and removing/reducing the stress are also discussed. In addition, future directions are made at the end of this paper.
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Research context
OpenAlex topics: Nanoporous metals and alloys · Corrosion Behavior and Inhibition · Anodic Oxide Films and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
China Nonferrous Metals Innovation Institute (Tianjin) Co., Ltd., No.86, Ziguang Road Automotive Industrial Area, Xiqing District, Tianjin 300393, China
Department of Materials and Manufracturing, Beijing University of Technology, Beijing 100124, China
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
China Nonferrous Metal Mining (Group) Co., Ltd., Beijing 100029, China
Funding
Fundamental Research Funds for the Central Universities · Key Research and Development Program of Jiangxi Province · Science and Technology Project of China Nonferrous Mining Group Co., Ltd.
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